摘要
以千年银杏（ＧｉｎｋｇｏｂｉｌｏｂａＬ．）古树叶片为材料对不同生境与银杏叶黄酮积累的关系进行了主成分分析和多元回归分析，结果表明影响银杏叶黄酮积累的重要生境因子是纬度、日照百分率、年降雨量和年平均温度。４因子的多元逐步线性回归方程对百年以上银杏叶的黄酮含量预测具良好的拟合效果。曲线回归分析表明，在纬度２８°１９′±２°３４′Ｎ或３８°６′±２°３４′Ｎ，年降水量７６２．３±１１４．５ｍｍ，日照百分率３５．３％±６．３％，年平均温度１５．９５±２．１５℃的条件下，最利于银杏叶黄酮的积累。但有利于叶内黄酮积累的生态条件并非银杏生长发育的最适条件。因此认为，选择有一定逆境胁迫的次适宜环境建立银杏采叶园，有利于提高叶内黄酮含量。
The relations between flavonoid accumulation in Ginkgo biloba L. leaves and the ecological conditions are studied by principal component analysis and multiple regression analysis. The principal effect of environmental factors on flavonoid content are latitudes, annual precipitation and annual mean sunshine percentage, and annual mean temperature. The multiple linear regression equation has a predictable effectiveness on the flavonoid content in over hundred year old tree′s leaves. The most suitable ecological conditions for it by nonlinear regression analysis is as follows: Latitudes is 28°19′ ± 2°34′N or 38°6′±2°34′N; Annual precipitation 762.3±114.5 mm; Annual mean sunshine percentage 35.3%±6.3%; Annual mean temperature 15.95±2.15℃, but these conditions seem to be not optimum for the growth and development of ginkgo. The viewpoint is put forward that ginkgo leave cultivation for higher content of flavonoid should be settled in the circumstances with certain stresses.
出处
《植物资源与环境》
CSCD
1998年第3期1-7,共7页
Journal of Plant Resources and Environment
基金
江苏省自然科学基金
关键词
药用植物
栽培
黄酮
生态条件
回归分析
银杏叶
Ginkgo biloba L.
flavonoid
ecological conditions
principal component analysis
regression analysis
